I was running Fedora core 3
Apple Xraid attached via a Qlogic Fibre-channel card
Apple Xraid is full (14 500gb drives) made into 2x3.0Tb filesystems
(with 1 disk for RAID-5 parity in each). Ext3 filesystems created using
GNU parted and mkfs.
This system has been working perfectly since March (along with another
identical system, still running) but last night, a routine reboot had
the system come upclaiming that the disk is physically only 750 Gb in
size. Now it looks to me as if the disk has lost it's gpt label and is
32-bit wrapping the available disk size (effectively blocking 2Tb of
space). I can see the full file structure within parted, and can mount
df -h shows:
/dev/sda1 2.7T 2.0T 748G 73% /mnt
Disk geometry for /dev/sda: 0kB - 3001GB
Disk label type: msdos
Number Start End Size Type File system Flags
1 32kB 801GB 801GB primary ext3 boot
Now I'd dearly love to get back the data on these partitions but at the
moment they think they are standard msdos-type partitions and won't let
me access 2Tb each of data.
I've google'd (and found: http://lkml.org/lkml/2005/2/9/150 which
describes my problem well, but no solution. Anyone got any ideas?
It looks to me as if the filesystem has replaced its gpt partition label
created originally by parted with a msdos partition label.
UNIX/Network Security Manager.